I find value in ease of "local" modifications to code. My editor being able to indent as soon as I type or paste code is a huge time saver. What's an even bigge

I find value in ease of "local" modifications to code. My editor being able to indent as soon as I type or paste code is a huge time saver. What's an even bigger time saver is my editor being able to perform tree operations on tree-like data. When using "curly brace languages", what I really miss is structural editing. I often deal with tree-like structures in any language, and being unable to simply cut a node, move my cursor to the start/end of a node, nest something, etc. is really inconvenient. These are operations that take me at most a second when using Emacs with smartparens. In JSX, for example, these one-second operations need me to imitate smartparens' behavior by hand then run Prettier since indenting by hand is an even bigger waste of time. Transforming e.g. <Foo> <Bar> <Baz /> </Bar> </Foo> to <Foo> <Bar /> <Baz /> </Foo> takes *seconds* even though the equivalent operation with S-expressions is a single keybind in Emacs.